<script setup>
import { getCodeImg } from '@/api/login'
import useUserStore from '@/store/modules/user'
import { decrypt, encrypt } from '@/utils/jsencrypt'
import { storage } from '@/utils/storage.js'

const userStore = useUserStore()
const route = useRoute()
const router = useRouter()
const { proxy } = getCurrentInstance()

const loginForm = ref({
  username: '',
  password: '',
  rememberMe: false,
  code: '',
  uuid: '',
})

const loginRules = {
  username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
  password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
  code: [{ required: true, trigger: 'change', message: '请输入验证码' }],
}

const codeUrl = ref('')
const loading = ref(false)
// 验证码开关
const captchaEnabled = ref(true)
// 注册开关
const register = ref(false)
const redirect = ref(undefined)

watch(route, (newRoute) => {
  redirect.value = newRoute.query && newRoute.query.redirect
}, { immediate: true })

function handleLogin() {
  proxy.$refs.loginRef.validate((valid) => {
    if (valid) {
      loading.value = true
      // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
      if (loginForm.value.rememberMe) {
        storage.set('username', loginForm.value.username)
        storage.set('password', encrypt(loginForm.value.password))
        storage.set('rememberMe', loginForm.value.rememberMe)
      }
      else {
        // 否则移除
        storage.remove('username')
        storage.remove('password')
        storage.remove('rememberMe')
      }
      // 调用action的登录方法
      userStore.login(loginForm.value).then(() => {
        const query = route.query
        const otherQueryParams = Object.keys(query).reduce((acc, cur) => {
          if (cur !== 'redirect') {
            acc[cur] = query[cur]
          }
          return acc
        }, {})
        router.push({ path: redirect.value || '/', query: otherQueryParams })
      }).catch(() => {
        loading.value = false
        // 重新获取验证码
        if (captchaEnabled.value) {
          getCode()
        }
      })
    }
  })
}

function getCode() {
  getCodeImg().then((res) => {
    const data = res.data
    captchaEnabled.value = data.captchaEnabled === undefined ? true : data.captchaEnabled
    if (captchaEnabled.value) {
      codeUrl.value = `data:image/gif;base64,${data.img}`
      loginForm.value.uuid = data.uuid
    }
  })
}

function getCookie() {
  const username = storage.get('username')
  const password = storage.get('password')
  const rememberMe = storage.get('rememberMe')
  loginForm.value = {
    username: username === undefined ? loginForm.value.username : username,
    password: password === undefined ? loginForm.value.password : decrypt(password),
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe),
  }
}

getCode()
getCookie()
</script>

<template>
  <div class="login">
    <el-card shadow="never" class="login-card">
      <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
        <h3 class="title">
          后台管理系统
        </h3>
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            type="text"
            size="large"
            auto-complete="off"
            placeholder="账号"
          >
            <template #prefix>
              <svg-icon name="user" class="el-input__icon input-icon" />
            </template>
          </el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            type="password"
            size="large"
            auto-complete="off"
            placeholder="密码"
            @keyup.enter="handleLogin"
            show-password
          >
            <template #prefix>
              <svg-icon name="password" class="el-input__icon input-icon" />
            </template>
          </el-input>
        </el-form-item>
        <el-form-item v-if="captchaEnabled" prop="code">
          <el-input
            v-model="loginForm.code"
            size="large"
            auto-complete="off"
            placeholder="验证码"
            style="width: 63%"
            @keyup.enter="handleLogin"
          >
            <template #prefix>
              <svg-icon name="validCode" class="el-input__icon input-icon" />
            </template>
          </el-input>
          <div class="login-code">
            <img :src="codeUrl" class="login-code-img" @click="getCode">
          </div>
        </el-form-item>
        <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">
          记住密码
        </el-checkbox>
        <el-form-item style="width:100%;">
          <el-button
            :loading="loading"
            size="large"
            type="primary"
            style="width:100%;"
            @click.prevent="handleLogin"
          >
            <span v-if="!loading">登 录</span>
            <span v-else>登 录 中...</span>
          </el-button>
          <div v-if="register" style="float: right;">
            <router-link class="link-type" to="/register">
              立即注册
            </router-link>
          </div>
        </el-form-item>
      </el-form>
    </el-card>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2018-2025 ruoyi.vip All Rights Reserved.</span>
    </div>
  </div>
</template>

<style lang='scss' scoped>
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("../assets/images/login-background.jpg");
  background-size: cover;
}
.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}

.login-form {
  .el-input {
    height: 40px;
    input {
      height: 40px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 0px;
  }
}
.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.login-code {
  width: 33%;
  height: 40px;
  float: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
.login-code-img {
  height: 40px;
  padding-left: 12px;
}
</style>
